Standing beside his spot on the Xbox stand, he is showing off his studio's game, #IDARB.

The game can be played by eight people at once, around one screen, and the aim is to simply fire a ball into an opponent's net, like football.

The game has echoes of the epically playable Sensible Soccer series, a world away from the painstaking simulation of the Fifa series.

The hashtag in #IDARB isn't a corny marketing ploy - the game has a terrifically unique social media tie-in.

Each match played on the game has a unique code. Anyone in the world can send a tweet with that code and activate bizarre actions to take place in the game.

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Media captionWATCH: Richard Taylor takes a tour of some of the new indie games at E3

"Could you imagine this game on PlayStation 2? Could you imagine buying this in a store? There was no way to sell it," says Mr Cifaldi.

"It's not like no-one wanted this stuff, it was just that your only option for selling a game was in a box.

"We're free to do this now."

Enormous

It's easy to group indie games as being titles that are small, quirky, fun - or even just nostalgic.

In that regard, No Man's Sky is a game changer.

Image copyrightHello GamesImage caption
As this concept arts shows, the intention is that the final game will allow players to chase each other through canyons

Alongside the multi-million dollar budgets of the biggest titles like Call of Duty and Assassin's Creed, No Man's Sky does not look like an indie game.

Rather than hire huge teams to painstakingly create levels, and worlds, that take months and years to build, the Hello Games team has instead put its efforts into creating a system that is essentially able to generate highly complex worlds itself.

"We're trying to do it procedurally," explains Mr Murray, "using next-gen consoles and PCs to make that content for us, and make that process easier. Once that constraint is removed we're a lot freer."

The game is about exploration, and the procedural world-building technology means that when you fly out into the distance, you're covering ground never before seen by anyone else playing the game.

Image copyrightHello GamesImage caption
Hello Games has yet to confirm a release date for No Man's Sky

In Sony's media suite at E3, the BBC finds Shahid Ahmad. As Sony's lead for independent games in Europe, he looks like a man who has just discovered buried treasure.

"No Man's Sky is an enormous deal," he says.

"Infinite, you could say. It's one of the most inspirational titles that we've seen.

"For me No Man's Sky evokes the hope of sci-fi, and the pioneering spirit. It's a great story. We're absolutely delighted."